Abstract
The basin of the Uruguay middle river has contributed important advances related to knowledge of the early settlement of southeastern South America. This paper presents recent progress of the research on the Paleoamerican period that is being carried out in the Tigre site (Uruguay), where a cultural component with Fishtail points, bifaces, preforms and other artifacts dated at ∼ 12,800 and 12,200 cal BP was found. The presence of silicified limestone (silcrete) in the Tigre site indicates mobility ranges of 190–350 km to obtain this lithic resource. The data presented here allow to have an accurate discussion of the chronological period occupied by Fishtail groups on the plains of Uruguay; and to recognize the late stages of the Fishtail point manufacturing process used by these human groups, one of the most successful adaptations during the end of the Pleistocene in South America.
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